Buffing wheel



Nov. 30, 1937. 0 s. w. LlPPlTT 2,100,340

' BUFFING WHEEL Filed Feb. 3, 1937 INVENTOR. 57EP/76W WA/PP/77 BY ATTORNEYS Patented Nov. 30, 1937 UNITED STATES PATENT OFFICE 14 Claims.

tiles were'arranged to prevent raveling thereof about the peripheral edge of the disc and also arranged to resist the deleterious effects of the centrifugal force imposed upon the fabric during the operation of the bufling wheel.

My present invention comprehends the use of an improved form and type of material for use in such buffing wheels and a new combination of 20. the improved material embodied hereinwith the textiles and knitted fabric disclosed in the copending applications aforesaid.

One of the objects of the invention is the pro- I j vision of a material which will absorb an abrasive compound and structure which will retain such abrasive in a more eifectuous manner than has been possible in bufilng wheels heretofore constructed and now in common use. Another object of the invention is to provide a structure which will eliminate. the rapid disintegration of the bufling wheels constructed from 1an unfabricated stock of the type employed here- Another object of the invention is'to construct a bumngwheel which is pliable, radially contractile and extensible though fabricated from a material of antithetic characteristics.

Further objects of the invention embrace a construction which is economic of manufacture,

with respect to fabrication and the cost of the ferred embodiment of the invention.

As illustrated in the accompanying drawing, Fig. 1 is a perspective view of. a bufling wheel of the sectional disc type embodying the present invention; Fig. 2 is a view in perspective illustrating an going and the manner in which all the various alternate form of construction for a bufllng wheel embodying the present invention;

Fig. 3 is an elevational view of a fragmentary portion of a buifing wheel disc section illustrating the application of a composite form of fabric;

Fig. ,4 is an elevational view of a fragmentary portion of the knitted fabric shown upon a greatly enlarged scale;

Fig. 5 is a similar view to that illustrated in Fig. 4 but showing in detail the composite form of fabric;

Fig. 6 is a view in perspective of a fragmentary portion of the twisted paper cord embodied in the present invention;

Fig. 7 is a sectional view show somewhat diagrammatically of a knitted fabric of the type embodying the present invention as adapted for use upon a stub arbor where an overhanging edge of the material constitutes the bufiing surface of the polishing device;

Fig; 8 is a view in perspective of a paper cord of tubular form having an abrasive core therein.

Bufllng wheels now in commercial use may be. divided roughly into two classes, first, the cloth or fabric wheels which include a woven or knitted material formed from textiles such as cotton and various other fibers of the type generally employed in the manufacture of clothing and similar goods.

The second class is the paper bufflng wheels which comprise a plurality of superposed layers of paper, cardboardor similar sheet stock blanked in configuration of an annulus to form a disc or cylindrical polishing wheel.

In the firstgroup, that is the cloth or woven type of fabric as distinguished from knitted textiles, the fabric is unsatisfactory because the 1 strands of the material are too closely woven to permit the entry and retention of the abrasive material applied to the bufling wheel during the operation thereof. Such buffing wheels are further objectionable due to the inherent repellent characteristics of the fibers to absorption of the grease or similar materials employed to support the abrasive. The latter characteristicis also present in the knitted textile buifing wheels,

- though as will be readily recognizedsuch a fabric may be loosely knitted to provide voids or interstices which receive and retain the abrasive laden grease or polishing material applied to the cutting face or perimeter of the bufllng wheel. Both of the above types of bufling wheels are further objectionable for certain types of stock due to the soft texture of the cotton commonly employed in the construction of the fabric.

The second type of polishing wheels, that is bufling wheels of the paper disc form, are objecrigid fabric yet a fabric which is pliable due to -or openings for the tionable because of the rapid disintegration of the paper during use. Such wheels though eflicient in operation with respect to their cutting characteristics break down, shred and fly to pieces so fast that little if any economy can be attributed to their use. .Moreover, such wheels when revolved at the high rate of speed normally applied to polishing or bufling wheels of this character are too rigid radially to accomplish in a satisfactory manner the various operations demanded of a'bufling wheel in normal operation and upon diversified work. The present invention contemplates a bufiing wheel made of a paper tape or strand which may be twisted or otherwise formed into a cord, then knitted so as to define voids reception of the abrasive material.

The invention further contemplates a buffing wheel made from paper cords sized with glue or similar adhesives, which produce a hard and the knitted structure thereof.

As disclosed in my co-pending applications the fabric is knitted in the form of a helical band. which-is cut and sewed to form the buffing wheel as by flanges l2 and locknuts 13, which are threaded upon the shouldered portion of the arbor l I. The fabric embodied in the present in-' vention may also be formed in bands ll adapted to be wound upon a cylinder or stub arbor with the marginal edges overhanging the ends thereof to form a polishing wheel of the end cutting type. 7 The fabric for either 'the disc or cylindrical form of bufling wheels is knitted in courses which are arranged for engagement with the work at.

substantially right angles thereto, thus in the bulfing wheel shown in Figs. 1 and 2 radial courses l6 are substantially normal to the work applied against the periphery of the wheel, while as shown in Fig. {7 the courses .IG are disposed for.

engagement with the work at right angles there to. The advantage of such constructionresides in an arrangement of loops in which the cords are restrained from raveling when the peripheral edge{ of thebufling wheel is in contact with the wor The construction .of the fabric in the present invention, comprehends the use of a twisted paper cord of a diameter which may be suitably handled in a knitting machine, and'also secondary cords of a greater diameter which may be employed as a reinforcement for the fabric and as a supplementary polishing medium; As illustrated in the enlarged fragmentary views of the fabric shown in Figs. 4 and 5 and also in the portion" of the disc wheel shown in Fig. 3, the paper reinforc- In forming such cords a sizing material having abrasive characteristics is preferably employed, though obviously the abrasive attributes. of the sizing material may bevaried to suit the type and character of the work for which the bufiing wheelis intended to be used. The paper or similar fibrous material contemplated herein is preferably of an absorbent nature, particularly with respect to the grease or other agent which forms the vehicle for the supports of the abrasive.

Although specific reference is made herein to the twisted paper cords l1 and I8, it is to be understood that fiat strips of paper or an untwisted tape of fibrous material such as designated'by' the reference character IS in Fig. 6 is contemplated as falling within the scope and spirit of the present invention. It will be further understood that the use of such material anticipates requisite modification of the knitting machine and knitting needles therein.

In Fig. 5 the fabric is -of. a composite type of construction. Here the reinforcing cords I! are formed of twisted paper of the character described above while the cords 18a surrounding the paper strands and forming the body of the fabric are made from a soft cotton textile or a similar material. As in the structure of Fig. 4 the cords l8w are adapted to retain the position of the paper strands I! which are arranged within the bufiing wheel for engagement with the work in a plane at right angles thereto.

The cord illustrated in Fig. 6 is constructed from a flat strip of paper l9 twisted upon itself to form the cord I! of circular transverse section, such a structure is desirable as it is readily adaptable for use in a knitting machine without modification thereof. However, as heretofore described the transverse sectional form of the tape is not essential to the successful operation of the bufling wheel as a cord of any cross sectional configuration may obviously be employed without impairing the function thereof within the .bufiing wheel. In the manufacture of a paper cord of cylindrical form, such as the tube shown in Fig. 8 the cementitious material applied to the skelp during the forming operation may be laden with an abrasive, which if desired, may be applied in such generous quantities as to provide a core 2| of abrasive material within the tube 22.- In such construction the grade or quality of the abrasive may be varied concomitant with the nature of the work or the demands anticipated for the buffing wheel.

The bufflng wheel illustrated in Fig. 2 comprises a corrugated side wall disc formed of a fabric of the type heretofore described. The

fabric may embody the construction ofv Fig. 4 or the composite fabric of Fig. 5. In Fig. 7 the fabric may be made entirely of paper cords or paper and textiles, the essential feature of this embodiment is that either of the fabrics is arranged on the polishing wheel with their binding courses It and the reinforcing cords [1 disposed for engagement with the work in a plane normal the surface thereof.

Although the foregoing description is. necessarily of a detailed character, in order that the invention may becompletely set forth, it is to be understood that the specific terminology is not intended to be restrictive or confining, and that various rearrangements of parts and modiflcap tions of detail-may be resorted towithout de parting from the scope or spirit of the invention as herein claimed.

I claim:

1. A bumng wheel comprising a fabric formed from cords of twisted strands of paper.

2. A bumng wheel comprising a plurality of superposed layers of paper fabric, said fabric being formed of strands of paper knitted in parallel courses, said courses being disposed in the ,bufllng wheel for engagement with the work at right angles thereto.

3. A paper buffing wheel comprising a fabric of knitted twisted paper cords, certain of said cords being 'disposed radially in said bufiing wheel.

4. A bufling wheel comprising a fabric formed of knitted paper cords.

5.-A bufling wheel comprising a fabric made of twisted paper cords, the fabric comprising a knitted structure. having the interlooped cords therein disposed in spaced relation which define voids for the reception of the abrasives used in polishing operations.

6. A paper buffing wheel comprising a pliable fabric knitted from twisted strands of paper impregnated with a sizing material having an abrasive characteristic.

30 8. A buiiing wheel comprising a knitted fabric formed of textile cords and twisted paper cords, said textile cords being knitted in parallel courses certain of which are entwined about and contain said paper cords.

9. A bufling wheel comprising a knitted fabric formed oi textile cords knitted in courses arranged for engagement with the work at right angles thereto, said textiles being looped about and retaining strands of paper.

10. A bufl'lng wheel comprising a knitted fabric formed of textile cords knitted in courses arranged ior engagement with the work at right angles thereto, said textiles being looped about and retaining strands otpaper of a character which will absorb and retain an abrasive.

11. A bufllng wheel comprising a knitted fabric formed of textile cords loosely knitted to define voids for the reception of abrasive material, and twisted paper cords surrounded by and knitted in said fabric and arranged for engagement with the work atright' angles thereto.

12. A bufling wheel comprising a knitted tabric formed from a paper tube having a core of abrasive material therein.

13. A bufling wheel comprising a knitted fabric formed from a paper cord coated with an abrasive laden adhesive.

14. A bufling wheel comprising a knitted fabric formed from cords coated with an abrasive.

STEPHEN W. mm. 

